CA1135744A - Joint ferrofluidique auto-activeur - Google Patents
Joint ferrofluidique auto-activeurInfo
- Publication number
- CA1135744A CA1135744A CA000349397A CA349397A CA1135744A CA 1135744 A CA1135744 A CA 1135744A CA 000349397 A CA000349397 A CA 000349397A CA 349397 A CA349397 A CA 349397A CA 1135744 A CA1135744 A CA 1135744A
- Authority
- CA
- Canada
- Prior art keywords
- sealing
- shaft element
- ferrofluid
- shaft
- pole pieces
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
- F16J15/43—Sealings between relatively-moving surfaces by means of fluid kept in sealing position by magnetic force
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/20—Driving; Starting; Stopping; Control thereof
- G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S277/00—Seal for a joint or juncture
- Y10S277/917—Seal including frangible feature
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US33,466 | 1979-04-26 | ||
US06/033,466 US4252353A (en) | 1979-04-26 | 1979-04-26 | Self-activating ferrofluid seals |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1135744A true CA1135744A (fr) | 1982-11-16 |
Family
ID=21870571
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000349397A Expired CA1135744A (fr) | 1979-04-26 | 1980-04-09 | Joint ferrofluidique auto-activeur |
Country Status (5)
Country | Link |
---|---|
US (1) | US4252353A (fr) |
EP (1) | EP0018791B1 (fr) |
JP (1) | JPS5942185B2 (fr) |
CA (1) | CA1135744A (fr) |
DE (1) | DE3064686D1 (fr) |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4252328A (en) * | 1980-05-01 | 1981-02-24 | Ferrofluidics Corporation | Self-activating ferrofluid seal and method |
USRE37058E1 (en) | 1980-05-10 | 2001-02-20 | Papst Licensing Gmbh & Co. Kg | Disk storage device having contamination seals |
USRE38662E1 (en) | 1980-05-10 | 2004-11-30 | Papst Licensing Gmbh & Co. Kg | Disk storage device having a sealed bearing tube |
USRE38673E1 (en) | 1980-05-10 | 2004-12-21 | Papst Licensing Gmbh & Co. Kg | Disk storage device having a hub sealing member feature |
USRE38601E1 (en) | 1980-05-10 | 2004-09-28 | Papst Licensing, GmbH & Co. KG | Disk storage device having a radial magnetic yoke feature |
USRE38772E1 (en) | 1981-03-18 | 2005-08-09 | Papst Licensing Gmbh & Co. Kg | Disk storage device having an undercut hub member |
GB2107004B (en) * | 1981-08-08 | 1985-07-24 | Nippon Telegraph & Telephone | A ferro fluidic seal |
JPS5891063U (ja) * | 1981-12-16 | 1983-06-20 | 株式会社富士電機総合研究所 | 磁性流体シ−ル装置 |
US4444398A (en) * | 1983-02-22 | 1984-04-24 | Ferrofluidics Corporation | Self-activating ferrofluid seal apparatus and method |
DE3430479A1 (de) * | 1983-08-26 | 1985-03-07 | Ferrofluidics Corp., Nashua, N.H. | Lageranordnung mit integrierter ferrofluid-dichtung |
US4575103A (en) * | 1984-04-09 | 1986-03-11 | Pedu Alexander A | Magnetic seal for magnetic particle clutches and brakes |
US4523741A (en) * | 1984-07-31 | 1985-06-18 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Linear motion valve |
US4506895A (en) * | 1984-08-29 | 1985-03-26 | Ferrofluidics Corporation | Self-activating ferrofluid seal apparatus and method of use |
EP0183477B1 (fr) * | 1984-11-20 | 1990-01-24 | Ferrofluidics Corporation | Appareil d'étanchéité ferrofluidique pour plusieurs arbres coaxiaux |
JPS61200957U (fr) * | 1985-06-06 | 1986-12-16 | ||
US4734606A (en) * | 1985-11-20 | 1988-03-29 | Hajec Chester S | Electric motor with ferrofluid bearing |
US5267737A (en) * | 1992-01-16 | 1993-12-07 | International Business Machines, Corp. | Magnetic fluid seal containment shield |
US5323688A (en) * | 1992-03-05 | 1994-06-28 | Walker Frank H | Hydraulic regenerative braking and four wheel drive system |
US5806856A (en) * | 1992-08-27 | 1998-09-15 | Ferrofluidics Corporation | On-site fillable liquid magnetic seal |
US5474302A (en) * | 1992-08-27 | 1995-12-12 | Ferrofluidics Corporation | On-site fillable ferrofluidic seal |
AU4863093A (en) * | 1992-10-08 | 1994-04-21 | Ferrofluidics Corporation | Ferrofluidic seal centering ring |
US5660397A (en) * | 1994-09-23 | 1997-08-26 | Holtkamp; William H. | Devices employing a liquid-free medium |
US5954342A (en) * | 1997-04-25 | 1999-09-21 | Mfs Technology Ltd | Magnetic fluid seal apparatus for a rotary shaft |
US6530317B2 (en) | 2000-12-05 | 2003-03-11 | Creo Srl | Method to engrave surface using particle beam |
US7291287B2 (en) * | 2005-05-25 | 2007-11-06 | Ferrolabs, Inc. | Method of making magnetic fluid |
US7129609B1 (en) | 2005-08-30 | 2006-10-31 | Ferrolabs, Inc. | Magneto-fluidic seal with wide working temperature range |
US9322478B2 (en) * | 2012-07-31 | 2016-04-26 | General Electric Company | Seal system and method for rotary machine |
CN105134964B (zh) * | 2015-09-09 | 2017-04-05 | 北京交通大学 | 磁性液体密封的多通道旋转输气装置 |
US10323530B2 (en) | 2016-02-29 | 2019-06-18 | Pratt & Whitney Canada Corp. | Tandem magnetic seal with single magnet |
US11462960B2 (en) * | 2019-12-02 | 2022-10-04 | Hiwin Mikrosystem Corp. | Rotor with first and second permanent magnets having support members and slots |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH293219A (de) * | 1948-12-23 | 1953-09-15 | Adolph Dr Razdowitz | Dichtungsvorrichtung an zwei relativ zueinander drehbaren Hohlkörpern. |
GB783881A (en) * | 1954-03-05 | 1957-10-02 | Vickers Electrical Co Ltd | Improvements relating to shaft and like seals |
US2996162A (en) * | 1958-04-07 | 1961-08-15 | Henry C Lehde | Devices for excluding magnetic particles from seals and bearings |
DE1956759C3 (de) * | 1969-11-12 | 1974-06-12 | Dornier System Gmbh, 7990 Friedrichshafen | Spaltdichtung zwischen einer Fläche und einem relativ zu dieser Fläche beweglichen und mit der Fläche einen abgeschlossenen Innenraum bildenden Körper mit einer der Fläche gegenüberliegenden Dichtleiste |
US3612549A (en) * | 1970-05-25 | 1971-10-12 | Melvin H Berkowitz | Pressure seal |
US3620584A (en) * | 1970-05-25 | 1971-11-16 | Ferrofluidics Corp | Magnetic fluid seals |
SU420836A1 (ru) * | 1971-05-17 | 1974-03-25 | Д. В. Орлов, А. К. Калинкин, А. П. Сизов , А. Аврамчук Ивановский энергетический институт В. И. Ленина | Вакуумное уплотнение |
US3746407A (en) * | 1971-08-13 | 1973-07-17 | Litton Systems Inc | Ferrohydrodynamic low friction bearing |
US3740060A (en) * | 1971-11-03 | 1973-06-19 | Avco Corp | A shaft seal |
US3848879A (en) * | 1972-12-19 | 1974-11-19 | Us Army | Shaft seal |
DE2628831A1 (de) * | 1976-06-26 | 1978-01-05 | Maschf Augsburg Nuernberg Ag | Dichtung |
US4171818A (en) * | 1977-04-04 | 1979-10-23 | Ferrofluidics Corporation | Dynamic lip seal using ferrofluids as sealant/lubricant |
JPS5831746A (ja) * | 1981-08-19 | 1983-02-24 | 東芝ケミカル株式会社 | 銅張積層板 |
-
1979
- 1979-04-26 US US06/033,466 patent/US4252353A/en not_active Expired - Lifetime
-
1980
- 1980-04-09 CA CA000349397A patent/CA1135744A/fr not_active Expired
- 1980-04-24 DE DE8080301348T patent/DE3064686D1/de not_active Expired
- 1980-04-24 EP EP80301348A patent/EP0018791B1/fr not_active Expired
- 1980-04-24 JP JP55053669A patent/JPS5942185B2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE3064686D1 (en) | 1983-10-06 |
US4252353A (en) | 1981-02-24 |
EP0018791A1 (fr) | 1980-11-12 |
JPS55145851A (en) | 1980-11-13 |
EP0018791B1 (fr) | 1983-08-31 |
JPS5942185B2 (ja) | 1984-10-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MKEX | Expiry |